Abstract
This paper is concerned chiefly with the method of porous foam manufacture using basalt stone powder sludge. The hydrogen peroxide(<TEX>$H_2O_2$</TEX>) of bloating agent has lots of problems to manufacture porous lightweight aggregate due to fast reaction rate with cement or calcium hydroxide(<TEX>$Ca(OH)_2$</TEX>). The <TEX>$H_2O_2$</TEX> injecting method using nozzle for manufacturing porous lightweight aggregate is proposed, in this study. This method is to inject <TEX>$H_2O_2$</TEX> at the pressure of 10 MPa on upper side of slurry mixing materials such as stone powder sludge and quick-lime(CaO) by injector. The specimen was dried in furnace at <TEX>$100^{\circ}C$</TEX> for 1 hour and cured at ambient temperature for 30 days. We analyzed the characteristics including specific gravity and water absorption. The experiments were found that the porous foam has low specific gravity, high water absorption and uniform distribution of porous more than manufactured foam by general bloating methods.
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